Where does cosmic microwave background radiation come from? a. it is radiation produced by pulsars and black holes that warps our view of other galaxies. b. it is radiation formed from the invention of microwave ovens that gets transmitted through space just like our radio waves. c. it is radiation leftover from the big bang. d. it is the sign we are searching for to indicate intelligent life exists elsewhere in the universe. pl me asap

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.